Eg̃uahẽ porã Roymall-pe, ne renda jopói porã joguápe. Rohechakuaa ha roaguyje ne pytyvõ, ha roñe'ẽ aguyje jopói libre ndive. Ejogua vove, rejoguáta mba'eporã porã ha reñemomba'e jopói libre ndive.Eheka ore apopyrã ha ejuhu ne jopói perfecto.
Mba'e rembosa'irã
Rojapo tembiapo rembosa'irã 2 ára peve.Ára sapy'agua oñemboare 2 ára.Oñemboare 5-7 ára mba'apo (Lunes a Viernes).Oñemboare sapy'a tetã ambuéva rupi.
It's an "optocoupler" relay module operating at 12 Volt.
Does this mean that 12 V is galvanic isolated from the arduino, that should control the relays? My first impression was: I am missing a separate ground for the relay control and for the arduino!
However, after some study I discovered that you CAN operate the board with galvanic isolated 12 V and the arduino's 5 V.
How? Don't use the straps!!
So don't connect the 4 middle pins with straps to Ground or to VCC of the relay module, but connect these 4 pins to the arduino's ground!
Now the 12V and the arduino's 5V are galvanic isolated! See photo!